Mobile device accessory



FIG. 1 is a perspective side view of a mobile device accessory;

FIG. 2 is a front view thereof;

FIG. 3 is a top perspective view thereof;

FIG. 4 is an alternate top perspective view thereof;

FIG. 5 is a bottom perspective view thereof;

FIG. 6 is an alternate bottom perspective view thereof; and,

FIG. 7 is perspective rear view thereof.

The broken lines represent environment and form no part of the claimed design. 

CLAIM The ornamental design for a mobile device accessory, substantially as shown and described. 